Special repayment, saving or consumption?

Such a split only makes sense if the inheritance is secure or if you can pay off the loans through special repayments during/after the fixed interest period. Otherwise, you will never get rid of the one bank.

We have such a split of 20, 15, 10 and the plan currently works out after 22 months of repayment and special repayments, so that the 10 loan is paid off with €100k in 4-5 years and the 15 loan is replaced with €50k after 8 years. Depending on how interest rates stand in 8 years, we either let the big one run or lower the repayment rate and increase the special repayment.

Exactly!

But even if, for example, I cannot fully repay a €120,000 KFW loan and a €200,000 10-year fixed interest loan after 10 years - I can also make a partial repayment. Then I simply take out a new 10-year loan with, for example, the remaining €70,000. This way, my repayment rate has also significantly decreased.

In the end, it doesn't really matter whether I can fully repay the loan or not. I can definitely put a good amount of money in and reduce the loan as much as possible.

It's not ONLY about being able to fully repay the loan and be completely free of debt from one bank. It is actually about being able to reduce the monthly repayment burden at any time, i.e., every 10 years.

Ultimately, it doesn't matter whether I can fully repay the loan or not.

That may be fine for you right now, but if you can't repay the loans or that one component, you will be tied to the future conditions of Münchner Bank because they are registered in the land register (no other bank will want to take over in second rank) and if in 10 years they don't have the best interest rates but are 0.5 or 1% higher (pure theory - but usual with car insurance) than the best provider, then you'll have to swallow that pill. That's all I want to say. I am an absolute fan of loan splitting and only regret that the 15-year one with €50k is not variable for me.

Yes, you can also fully repay the KfW loan after 10 years or continue it at a new interest rate. In a way, you secure the term for 30 years, but with new interest rates after 10 years.

But even if, for example, I cannot completely repay a €120,000 KfW loan and a €200,000 10-year fixed loan after 10 years – I can also make a partial repayment. Then I just take out a new 10-year loan with, for example, the remaining €70,000. This way, my repayment rate has also decreased significantly.

No, for such "small" amounts I would not conclude a new 10-year contract that binds you to the bank. You can simply let the loan continue at the current daily interest rates. This happens automatically if you do nothing.

No, for such "small" amounts I wouldn't take out a new 10-year contract that binds you to the bank. You can simply continue the loan at the current daily interest rates. This happens automatically if you do nothing.

Yes, that's what I mean. But if I just continue the loan after 10 years like that, how long am I then binding the interest rate? What if I continue it and the interest rate rises enormously after 2 years? Doesn't it make sense to secure another 10-year fixed interest rate? Sure, if I just "continue" I can of course also pay off the loan completely after a few years if I expect some extra money again. But what is the interest rate based on then if I just continue? Like with the variable interest rate according to EURIBOR?

That may be okay for you right now, but if you can't repay the loans or the one component, you will be tied to the future conditions of the Münchner Bank since it is listed in the land register (no other bank will want to replace it in second lien) and if in 10 years they don’t have the best interest rates but are 0.5 or 1% higher (pure theory – but common with car insurance) than the best provider, then you will have to swallow that pill. That’s all I mean. I am a big fan of loan splitting and only regret that the 15-year one with €50k isn’t variable for me.

I would secure the interest rate with the Münchener Hypothekenbank for 30 years with a “higher” amount. The loan is supposed to run initially and not be repaid. The repayment would then come for the 10-year loans (KfW + Volksbank) – which I would simply “keep running” or alternatively apply for a new loan for 10 years at the bank of my choice, correct? I have already secured the 30-year fixed-interest loan now with good interest rates, which I may want to keep due to interest rate fluctuations to not expose the entire amount to risk. Thus, the loan would run “forever” and the other short-term loans should be repaid quickly.